Author Topic: cuba and ham  (Read 4700 times)

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Offline coppercone2

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cuba and ham
« on: July 20, 2021, 10:50:12 pm »
 

Offline vk6zgo

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Re: cuba and ham
« Reply #1 on: July 21, 2021, 12:27:23 am »
https://tech.slashdot.org/story/21/07/20/1839213/fcc-investigating-whether-cuban-government-is-jamming-ham-radio

I thought this is interesting

my hunch based on just history is yes

My hunch is the story is a lot of bollocks.
 

Offline A.Z.

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Re: cuba and ham
« Reply #2 on: July 21, 2021, 06:32:56 am »
 

Offline FlyingHacker

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Re: cuba and ham
« Reply #3 on: July 21, 2021, 07:03:21 am »
The jamming is definitely there. It's not fake. I hear it in St Louis, MO.

Many people have use the TDOA on KiwiSDR and it seems to indicate Cuba.
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Offline A.Z.

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Re: cuba and ham
« Reply #4 on: July 21, 2021, 07:21:45 am »
The jamming is definitely there. It's not fake. I hear it in St Louis, MO.

Many people have use the TDOA on KiwiSDR and it seems to indicate Cuba.

well it can even be heard in Europe

https://swling.com/blog/2021/07/from-cuba-with-noise-massive-jamming-on-the-40-meter-band/

and if the TDOA points to Cuba, then I think it's from Cuba :)
 

Offline coppercone2

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Re: cuba and ham
« Reply #5 on: July 21, 2021, 08:06:30 pm »
I picked up something jammish on 7.16 MHz using a loop antenna aimed at cuba from ~1000 miles

try a florida web sdr, with that I saw like 8 strong anomalous noise bands from


edit***
sorry if I mislead anyone, I wrote 6 instead of 7, confused the FUCK out of myself
« Last Edit: July 23, 2021, 06:30:48 am by coppercone2 »
 

Offline cdev

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Re: cuba and ham
« Reply #6 on: July 21, 2021, 08:55:38 pm »
Because HF signals go all around the world, this is really evil and probably violates some international law.

Cuban HF radio (radio Havana) comes in extremely strong, too strong, near new york. Its too strong, and like the bible thumpers (overcomers ministry) it seems so strong sometimes that its causing band splatter.

Those two things are high annoyances to my attempts at radiolistening.

I wonder what the voltage is at the input terminals.
« Last Edit: July 21, 2021, 09:01:14 pm by cdev »
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Offline ahbushnell

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Re: cuba and ham
« Reply #7 on: July 22, 2021, 02:29:42 am »
https://tech.slashdot.org/story/21/07/20/1839213/fcc-investigating-whether-cuban-government-is-jamming-ham-radio

I thought this is interesting

my hunch based on just history is yes

My hunch is the story is a lot of bollocks.
It seems reasonable that a country that would cut off the internet would do the same with radio.  Why do you think it's bollocks?
 

Offline vk6zgo

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Re: cuba and ham
« Reply #8 on: July 22, 2021, 06:24:49 am »
https://tech.slashdot.org/story/21/07/20/1839213/fcc-investigating-whether-cuban-government-is-jamming-ham-radio

I thought this is interesting

my hunch based on just history is yes

My hunch is the story is a lot of bollocks.
It seems reasonable that a country that would cut off the internet would do the same with radio.  Why do you think it's bollocks?

All through the Cold War period, they never limited Ham Radio, so if true, historically, it is unusual.
I had also seen nothing about it on the various ham websites before the posting here.

Even now, I have only seen a few postings on QRZ.com, with others as dubious about it as I was.

Eham had a very short article, which looked like it had been picked up from a non-technical report, with references to hams "broadcasting".

If Cuba are doing this, Jamming is a ridiculous brute force approach.
The silly thing is, that they can declare an emergency & close down Amateur Radio for a time.
(After all, that was done in wartime by all the belligerents).

« Last Edit: July 22, 2021, 06:53:43 am by vk6zgo »
 

Offline vk6zgo

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Re: cuba and ham
« Reply #9 on: July 22, 2021, 07:16:03 am »
Because HF signals go all around the world, this is really evil and probably violates some international law.

Cuban HF radio (radio Havana) comes in extremely strong, too strong, near new york. Its too strong, and like the bible thumpers (overcomers ministry) it seems so strong sometimes that its causing band splatter.

Those two things are high annoyances to my attempts at radiolistening.

I wonder what the voltage is at the input terminals.

Seeing Havana is about 1300 miles away from you, I don't think the splatter is created by overload to the input of your radio.

I would suggest that Radio Havana may be clipping their modulating signal hard, causing artifacts outside the allocated bandwidth of their transmission, along with audible distortion of the received programme.

The "God botherers" may be doing the same thing.

The other, probably less likely, alternative is plain old overmodulation, which sounds similar around the transmissions fundamental frequency, but would also cause the transmission of strong harmonics, which you should be able to hear on higher bands as well.



 

Offline Jeroen3

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Re: cuba and ham
« Reply #10 on: July 22, 2021, 07:57:14 am »
Youtube suggested me this video yesterday, not sure about how true it is.

 

Offline A.Z.

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Re: cuba and ham
« Reply #11 on: July 22, 2021, 08:02:57 am »

All through the Cold War period, they never limited Ham Radio, so if true, historically, it is unusual.
I had also seen nothing about it on the various ham websites before the posting here.

Even now, I have only seen a few postings on QRZ.com, with others as dubious about it as I was.

Eham had a very short article, which looked like it had been picked up from a non-technical report, with references to hams "broadcasting".

If Cuba are doing this, Jamming is a ridiculous brute force approach.
The silly thing is, that they can declare an emergency & close down Amateur Radio for a time.
(After all, that was done in wartime by all the belligerents).

Reading through the various bits of info floating on the 'net, the purpose isn't to stop hams from transmitting, but to impede to anyone to receive (not just hams); judging from the infos there are some hams outside Cuba transmitting news so the Cuban government is trying to jam those and garble the received signals
 

Offline Lord of nothing

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Re: cuba and ham
« Reply #12 on: July 22, 2021, 09:11:45 pm »
Well the never saw when the hole neighbourhood use Powerline.  :=\ :-DD
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Online Bud

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Re: cuba and ham
« Reply #13 on: July 22, 2021, 10:22:52 pm »
Youtube suggested me this video yesterday, not sure about how true it is.


Bullshit. The guy cherry picked a portion of the 40m band which hams must share with generic broadcasting radio stations. The jamming, if exists, is more likely targeting broadcasters and not hams.
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Offline Lord of nothing

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Re: cuba and ham
« Reply #14 on: July 22, 2021, 11:12:26 pm »
Made in Japan, destroyed in Sulz im Wienerwald.
 

Offline ahbushnell

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Re: cuba and ham
« Reply #15 on: July 23, 2021, 07:17:40 pm »
 

Offline Lord of nothing

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Re: cuba and ham
« Reply #16 on: July 23, 2021, 07:22:45 pm »
Its based on the Cubain Island to.  :popcorn:
So there are 3 potential Sourced the Signal could come from.
Made in Japan, destroyed in Sulz im Wienerwald.
 

Offline ahbushnell

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Re: cuba and ham
« Reply #17 on: July 24, 2021, 12:02:09 am »
Its based on the Cubain Island to.  :popcorn:
So there are 3 potential Sourced the Signal could come from.

So you think the US Navy is jamming the ham radio. 
 

Offline Lord of nothing

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Re: cuba and ham
« Reply #18 on: July 24, 2021, 02:28:51 pm »
 ;) Since I believe in Sinyce (or how to spell) not God I dont know.
But there are atleast 3 different possible thinks who could be the source:
a) Cuba Mainland
b) Guantanamo Base
c) a Vessel

In the past the US did and claim a lot of tinks who later be found out where wrong.
Made in Japan, destroyed in Sulz im Wienerwald.
 

Offline A.Z.

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Re: cuba and ham
« Reply #19 on: July 24, 2021, 03:07:05 pm »
;) Since I believe in Sinyce (or how to spell) not God I dont know.
But there are atleast 3 different possible thinks who could be the source:
a) Cuba Mainland
b) Guantanamo Base
c) a Vessel

In the past the US did and claim a lot of tinks who later be found out where wrong.

this isn't an US claim, as far as I know, several hams and swlers from different parts of the globe reported the noise and TDOA was used by some of them to find the location, add to this that the band was (is ?) actively used by Cuban expats to transmit uncensored news to Cuban listeners and then try making an educated guess :)
 

Offline Lord of nothing

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Re: cuba and ham
« Reply #20 on: July 24, 2021, 03:20:23 pm »
Sure but there is no evidence. The origin can be everything be.
Made in Japan, destroyed in Sulz im Wienerwald.
 

Offline A.Z.

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Re: cuba and ham
« Reply #21 on: July 24, 2021, 03:44:24 pm »
Sure but there is no evidence. The origin can be everything be.

again, all the TDOA triangulations point to Cuba, and you may run one by yourself using some kiwisdr receivers

[edit]

Also, according to a number of reports, the jammed frequency change in time and (almost) follow the ones used by expats in central america and florida to transmit news, cannot verify that (tx frequencies) but in effect the frequencies change in time

« Last Edit: July 24, 2021, 03:50:00 pm by A.Z. »
 

Offline coppercone2

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Re: cuba and ham
« Reply #22 on: July 24, 2021, 04:06:11 pm »
yeah you can verify if its guantanamo with directional antennas, its surrounded by a mine field and very unfriendly cuban soldiers (the most trustwrothy) so if they tried to transmit something outside of the base it would immediately be confiscated and they would get arrested

the vessel would need to be outside of the nations waters and then you could triangulate it with mexican american and south american radios to the coast I think
« Last Edit: July 24, 2021, 04:08:12 pm by coppercone2 »
 

Offline coppercone2

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Re: cuba and ham
« Reply #23 on: July 24, 2021, 04:49:47 pm »
I tried using the kiwisdr for some weird frequency near the 7MHz area and I got it to work only once. I got like a weather map of color of the 'bay' (near the coast between cayman) of bottom of cuba once but then it stopped working. Looked kinda imprecise.

I assume there is some kind of trick to this. It says completed but there is no heat map. I dunno why I got it one time. I tried it 20 more times with no cigar

hmm it started working again. very fun program but it displays some crazy stuff lol
« Last Edit: July 24, 2021, 05:02:53 pm by coppercone2 »
 

Offline Lord of nothing

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Re: cuba and ham
« Reply #24 on: July 24, 2021, 07:19:43 pm »
Quote
so if they tried to transmit something outside of the base it would immediately be confiscated and they would get arrested
What did you mean with?
When a 3Ltr Agency say the need a Building with Roof Access why the could get arrested?
The US Staged anough thinks to can claim to have a Reason for War.
Made in Japan, destroyed in Sulz im Wienerwald.
 


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